Process simplifications to the Pegasus solar cell - SunPower's high-efficiency bifacial silicon solar cell

Cudzinovic, M.; McIntosh, Keith R.

doi:10.1109/pvsc.2002.1190458

Cited by 4 publications

(3 citation statements)

References 4 publications

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“…PECVD silicon nitride deposition is applied. To reduce fabrication cost, the pattern of the rear side for boron and phosphorus diffusion was developed with low-cost screen printing technology to replace photolithography in the fabrication of IBC solar cells [67,68]. Silicon dioxide is formed on the entire rear side, and a pattern of holes in the oxide at the boron and phosphorus diffused areas is generated.…”

Section: Interdigitated Back Contact Solar Cellsmentioning

confidence: 99%

“…The solar cell fabrication is then completed by an annealing step for the contact formation. As an overview, the IBC solar cell structure is shown in Figure 8 and the inferred solar cell fabrication steps according to [65][66][67] are given in Table 6. SunPower demonstrated IBC solar cells with efficiencies of 21.5%.…”

Section: Interdigitated Back Contact Solar Cellsmentioning

confidence: 99%

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Industrial Silicon Wafer Solar Cells

Neuhaus¹,

Münzer

2007

Advances in OptoElectronics

164

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In 2006, around 86% of all wafer-based silicon solar cells were produced using screen printing to form the silver front and aluminium rear contacts and chemical vapour deposition to grow silicon nitride as the antireflection coating onto the front surface. This paper reviews this dominant solar cell technology looking into state-of-the-art equipment and corresponding processes for each process step. The main efficiency losses of this type of solar cell are analyzed to demonstrate the future efficiency potential of this technology. In research and development, more various advanced solar cell concepts have demonstrated higher efficiencies. The question which arises is “why are new solar cell concepts not transferred into industrial production more frequently?”. We look into the requirements a new solar cell technology has to fulfill to have an advantage over the current approach. Finally, we give an overview of high-efficiency concepts which have already been transferred into industrial production.

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Section: Interdigitated Back Contact Solar Cellsmentioning

confidence: 99%

Section: Interdigitated Back Contact Solar Cellsmentioning

confidence: 99%

Industrial Silicon Wafer Solar Cells

Neuhaus¹,

Münzer

2007

Advances in OptoElectronics

164

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“…Besides high efficiency, other striking features of IBC cell are coplanar cell interconnection and uniform front surface appearances that is desirables for building integration [2]. However, the high cost due to the complex fabrication process is one of the drawbacks [3].…”

Section: Introductionmentioning

confidence: 99%

Investigation of XeF<inf>2</inf> dry etching for contact isolation of screen printed IBC solar cell

Khairunaz

Sapeai

Azhari

et al. 2013

2013 IEEE 39th Photovoltaic Specialists Conference (PVSC)

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We demonstrated the use of Xenon Difluoride (XeF 2 ) plasma less vapor etching for isolation of n and p regions in screen-printed interdigitated back contact (IBC) solar cell. The fabrication process is free from lithography process and carried out using standard conventional silicon solar cell equipment. A ptype CZ wafer was used as the starting material and POCl 3 furnace was used to form the emitter. Silver and Aluminum pastes were screen printed to form emitter and base contacts respectively. An automated XeF 2 vapor etching system was used for blanket etching of doped region between emitter and base metal contacts. Solar cell LIV response was measured as a function of XeF 2 etching. Open-circuit increased as a function of XeF 2 etching indicating removal of doped silicon; however, solar cell response was poor presumably due to large un-passivated, junction-free regions between positive and negative contacts. In order to improve performance, an extra alignment step is needed to etch small regions only.

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